Low-water alarm.



B -5W YKADEL, J. A. PILGHEB. & H. .W. GOD'QINGTON.

LOW WATER ALARM. APPLIOA'IIOR FILED JULY 25, 1914.

Patented Feb. 2, 1915.

' Wihwmo 1,12"? ,oio.

\ ter Alarms,

STATES B'ZER-S W. KADEL, JOHN A. PILCHER, AND HARRY W. CGDDINGTON, OF ROANOKE, VIRGINIA.

LOW-WATER ALARM.

Application filed J1i1y'25,

To all wiwm it may concern:

vBe it known that we, Brass W. KADEL, Jenn A. PILCHER, and HARRY W. Convinc- TON, citizens of-the United States, residing at Roanoke, in the county of Roanoke and State of Virginia, have invented certain new and useful Improvements in Low-Naspecification.

This invention relates to low water alarms for boilers and its object is to overcome the defects of such devices as now known and used. It is especially adapted for use with locomotive boilers and may be employed to control the supply of the feed water to a boiler, as well as to provide a warning to the attendants that the water is dangerously low.

' With these objects in view the invention consists in the construction and combination of parts as will be herein set forth and particularly claimed. 1

In the'drawing'which forms a part of these specifications, Figure 1; is a side ele vation of a locomotive having our invention applied thereto and Fig. 2 is a similar view of the invention detached from the locomotive and drawn to an enlarged scale over that of Fig. 1.

Referring to the drawings where like parts are given the same reference numbers wherever they occur, 1 represents the locomotiv having a boiler 2. The boiler has the customary fire-box 3, wagon-top sheet 4,

crown sheet 5 and fire-box end sheets 6 and 7.

At 8 we insert into the boiler through the wagon-top sheet 4, a steam fitting 9. The lower or internal portion 9 of this steam fitting 9, is tubular in form, the tube 9 being open at its lower end at 10. At llthe steam fitting 9 is provided with an externally threaded portion adapted to be screwed into a threaded opening in the wagon-top sheet of the boiler.

The upper or external portion of the steam fitting 9 is made in'the form of a cross-T, having four outlets. To the outlet 12 an expansion element or pipe 13- is at,- tached, this expansion pipe being disposed at a slight inclination above the horizontal as it proceeds away from the outlet-l2 for drainage and is preferably composed of a metal such as copper or brass having a relatively high coeflicient of expansion.

Specification of Letters intent.

of which the following is a- Patented rest 2, 191a: 1914 Serial No. 853,242.

in an axial line with the depending or tubular portion 9" of the steam fitting 9.

The steam fitting 9 thus forms a fluid connection between the boiler and expansion pipe, its fluid communication being made with the boiler at a point below the normal water level therein and immediately over the highest point of the crown sheet.

The expansion element 13 terminates in a hollow fitting 16, the expansion element being in open fluid communication with the hollow fitting. The said hollow fitting 16 is provided with a clean-out opening 17 and a blow-oil connection 18 from the cavit thereof, and an external trunnion 19, which latter forms a pintle for the upperend of a lever 20. I I

The lever 20 is pivoted at '21 to a bracket .22 which bracket is shown as mounted on the boiler by means of the studs 23. The lower end of the lever 20 is provided with an adjusting screw 24 havinga check nut 25, and the point of this adjusting screw is adapted under certain conditions to contact the stem 26 of an air or steam valve 27. This valve 27 may be of anyronvenient construction that will open when the screw 24 is pressed against the stem 26 and close when the screw 24 is released.

The operation of our invention is as follows: The open lower end of the, tubular portion 9 of the steam fitting 9 isdisposed gt a height above the crown sheet of the oiler corresponding with what maybe con- 4 sidered a dangerously low position of. the;

as this water will have little circulation its temperature will fall somewhat belowthat of the steam and water within the boiler screw 24 should be adjusted to not quitejcon ,tact the stem 26 of As long as the water is above I ,108 With the parts so filled with water the the valve 27 sdthatgthd valve 27 will be closed against-the pa ag v of steam or air from the-supply.pipe284:1

with ti :2 30

A canne 3910 on! on the d blmwdif 1e expansion sigma GTQN,

lament ansion e hiare be- 45 P! the sand 1. expansion e on, and the sa 0 connested to the arm f thesairg W. CGBEHH e cavity 0 iorm a 'fiul ERS W. KADEL.

.UEOWN, N Luisa,

molly whermfwe 'affix our" x JG Mas @he sa in m'res m presence of awe witnesses.

- war 

